Evil: Inside Human Violence And Cruelty -

A central theme of human cruelty is the "magnitude gap" between the victim and the perpetrator. To the victim, the act is a life-altering, monumental trauma with long-lasting effects. To the perpetrator, the act is often a minor detail, a justified reaction, or something they have already forgotten. This gap explains why "meaningful" apologies are so rare; the two parties are living in entirely different moral realities. The Fragility of Self-Control

This is perhaps the most frightening root. When people believe they are acting on behalf of a "higher good"—whether religious, political, or social—they can justify any atrocity. If the goal is a utopia, then any "evil" done to achieve it is seen as a necessary sacrifice.

This is "evil" as a means to an end. It isn’t about hate; it’s about utility. If someone stands between a perpetrator and a desired resource (money, power, territory), violence is used as a tool to remove the obstacle.